Advanced Micro Devices Inc (AMD)

[chipguy]

And because so much area is sram the normal defect density predictions are likely to be too conservative.

Quite so. The Madison L3 architecture can fully repair up to four severe defects without loss
of capacity. From a susceptibility point of view Madison is comparable in effective area to
Opteron if not a bit smaller. Add in the effects of relative process maturity, BEOL differences
and parametric yield problems unique to SOI and I wouldn't be surprised if Madison yielded
much better than Opteron over most of their respective lifetimes.